<!DOCTYPE html>
<html>
<head>
	<meta http-equiv="Content-Type" content="text/html">
	<meta charset="utf-8" />
	<meta http-equiv="X-UA-Compatible" content="IE=edge" />
	<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
	<title></title>
</head>
<body erke-hide>
</body>
<script>
/**
 * @param {number} num
 * @return {number}
 */
var findComplement = function(num) {
    num=num.toString(2).split('').reverse();
    var res=0;
    var n=1;
    for(var i in num){
    	if(num[i]==1){
    		num[i]=0;
    	}else{
    		num[i]=1;
    	};
    	res+=num[i]*n;
    	n*=2;
    };
    console.log(num);
    console.log(res);
    return res;
};
var res=new findComplement(5);
</script>
</html>